The Quake World ChampionshipDuel Qualifier #4 for North America will start on 18:00 CDT, 21 July 2017. The duel portion of the Championship will have $340 000 up for grabs. You can find more information about the Online Qualifiers at the ESL page. This will be the last NA Duel Qualifier.

The Qualifier will be played in Single Elimination format, with the players competing until the top 16 players have been identified. Starting 13:00 CDT, 23 July 2017, each Ro16 match will be played and live streamed. Each of the 8 winners advances to the Quake World Championship Regional Finals.

For duel, I asked Zoot if he knew, and he thought that it might be double brackets that would be played up until you enter the top 12 qualifying slots.

So if that is correct... the winners bracket would go up until the quarter finals which would not be played (all 8 players in winner bracket quarter finals are guaranteed top 12), while everybody who lost before the wb qf, would battle for the 4 remaining spots in the loser bracket.